GTSM principle introduction

As a TTL-detection based security mechanism, GTSM prevents attacks by checking the Time to Live (TTL) of packets. The TTL field exists in IP headers and is used to set the maximum number of devices that the packets can pass through. The GTSM mechanism, by ensuring that packets of a certain protocol or service are forwarded only when their TTL is within the specified range, protects the system from attacks.

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